Liner washer



J. A. WILCOX LINER WASHER June 2,1936.

Filed Jan. 12, 1934 Patented June 2, 1936 v UNITED STATES PATENT GFFKIE LINER WASl-lEIt John A. Wilcox, Huntington Beach, Calif. Application January 12, 1934, Serial No. 706,380 6 Claims. (01. 166-20) invention relates to a washer for liners, shaped so as to fit on the top of the rubber packperforated pipes, or the like, when said parts are er 6. positioned in a well. A mandrel l fits against the bottom of the Anobjectof my invention is to provide a washpacker 6, and this mandrel is provided with a .er, the two spaced rubber rings of which can be plurality of slots 8 which extend horizontally expanded and collapsed at any desired point in therethru. A joint 9 screws onto the bottom of the well. the mandrel l with a straight thread so that wear A further obiect is .to provide a Washer which can be taken up in the packers. The joint 9 is will pass freely into and out of the well, due to also provided with a plurality of elongated slots 10 the fact that the rubber packers or rings are 001- It. The circulating fluid passes out of the slots 10 lapsed except when the tool is in operative po- 8 and H3, and thence thru the perforations in the sition. pipe, as will be further described.

Another obiect is to provide a novel means of A lower rubber packer Ii fits against the botcontrolling the passage .of fluid thru the tool, 1. e., tomof the joint 9, and a ring l2 flts against the the passage is open when the tool is being run bottom surfaceof the packer ll. 5

into or out of the well, and is closed when the A sub l3 screws onto the bottom of the ring I2 tool is in operation, so that a washing action o cand this sub is so constructed as to hold the valve curs thru the perforations ,or around a liner. seat, as will be further described,

An advantage of my tool is that the rubber Aeouplin it r w in o e lower end of the packers ,or rings can be long, thus providing a sub [3, and clamps a seat l5, in position. The 20 large bearing surface against the Wall of the seat 15 is held between the top of the coupling well whichincreases the effective life of the pack- 14 a a w y projecting ring l5 0n the ers and also permits them toexpand and collapse sub l3. A fitting i? screws onto the coupling i4, more effectively. and in turn, receives the threaded shank of a A further bj ct i t provide t of th spear |8, of usual and well known construction, character stated which can be successively operas disclosed in Patent No. 1,751,090, issued March ated at various points in the well without :With- 8, 9 The spear 8 is so a anged that it will drawing same t t urface engage the liner or pipe against downward pres- A further bb is to provide a tool f the sure of the tool, 1. e., the slips i9 of the spear 30 character stated which is simple and efi ective in t'e h pipe or liner, thus holding the tool 30 operation and which will more thoroughly wash ege e j w w movement The Spear can be the perforations in the .pipe or the liner. rele usual t Wen known manner so other objects advantages and features of that the tool can be raised or lowered any desired vent-Mn :fii' 'y happear' from the accompanying distanceand again set, so as to wash the liner or drawing, the subjoined detailed description, and perforamons' 35 the appended claims A tube 20 fits on the 1ns1de of the tool and ex- In the drawing. tends substantially the length thereof. A flange Figure 1 is a longitudinal sectional view of my at E ugper i g g g p 1s Splmed or tool with parts thereof shown in elevation. groove. as S Own i an sm 0 correspond 40 mg sphnes or grooves in the head 3. Thus, the 40 Figure 2 is a sectional view taken on line 2-2 tube can move longitudinally but cannot rotate of Fig. 1.

relative to the outer part of the tool. Holes 22 F1gure 15 enlargedfragmenta'ry longltu' are provided in the tube 2% opposite the slots 8.

dmal sectional View of the valve assembly. The circulating fluid can thus pass outwardly Figure 4 is a Sectional View taken on line thru the holes 22, thence into the slots 8 or ll],

o F thereby washing the liner or perforations.

Refe rin re particularly to e d aw t The lower end of the tube has a collar 23 numeral l indicates a P p 111161 Which has a screwed onto it, and this collar carries a valve 24.

v series of holes 2 extending thru the wall thereof, h va1ve is held in a spider o t t t circulatsaid holes being washed or cleaned by the tool, as ing fluid can pass around the edges of the valve Will be fu t e describedwhen the sleeve 20 is raised. In lowered position,

My washer comprises a head or coupling 3 the valve 24 rests on the seat l5, thus closing the which is threaded as at 4 to receive the drill pipe longitudinal passage thru the tool and compelling or tubing. A ring 5 screws into the bottom of the the circulating fluid to pass outwardly thru slots coupling 3 and the bottom surface of this ring is 8 and ID to wash the liner or perforations. The 55 collar 23 also has a. splined connection, as shown at 25, with the sub l3, thereby preventing relative rotation between the tube and the balance of the tool.

When the tool has been lowered on the drill pipe to the desired point, the spear I8 is set, thus preventing further downward movement of the tool. Weight is then exerted on the drill pipe which causes the packers 6 and l I to compress and also to bulge outwardly against the casing i. e., the packers are set. A tight seal is thus provided at the top and bottom adjacent the slots 8 and H]. The compression of the packers telescopes the tool, thus pressing the valve 24 against its seat [5. While the tool was being run into the hole, the valve 24 was ofi? its seat, thus permitting the circulating fluid to move longitudinally thru the tool. When the packers are expanded, this free longitudinal movement of the circulating fluid is stopped and the fluid is caused to by-pass outwardly thru the slots 8 and I0, thence thru the perforations 2, to thoroly clean said perforations.

When weight is taken oil the drill pipe it is rotated and an upward pull exerted, in order to release the spear l8, the packers 6 and II will be collapsed and simultaneously, the valve 24 will be lifted from its seat. Circulation thru the perforations is thus stopped, and the tool is moved to another point where the operation is repeated.

Another object in unseating the valve prior to moving the tool is that the pressure is equalized on the inside and outside of the tool and also on both the top and the bottom of the packers. When this has been accomplished, the tool can be readily moved without danger of injuring the packers, i. e., when the pressures are equalized, the packers will not be forced against the wall of the well, and will therefore readily release or collapse and allow the tool to be moved.

Having described my invention, I claim:

1. In a liner washer, a pair of spaced packers in the washer, a spear attached to the washer, said washer having openings therethru between the spaced packers, said washer being longitudinally collapsible, said packers being adapted and arranged to be compressed and expanded, when the washer is collapsed, whereby a seal is provided on each side of the openings, a fluid conduit extending longitudinally in the washer, said conduit having openings therein aligned with the first named openings, a closure means in the conduit below said openings, said closure means being closed on expansion of the packers.

2. In a liner washer, a pair of spaced packers on the washer, a spear attached to the washer, said washer having openings therein between the spaced packers, said washer being longitudinally collapsible, said packers being adapted to be 5 compressed and expanded, when the washer is collapsed, whereby a seal is provided on each side of the openings, a valve means in the washer, and means operably connected to the valve means whereby said valve means is closed when the 10 packers are expanded.

3. In a washer including a pair of spaced packers, said washer having a plurality of openings arranged between said packers, a spear attached to the washer, said spear being adapted to pre- 15 vent downward movement of the washer, a tube extending longitudinally in the washer, a valve on the tube, a valve seat in the washer, said valve being seated when weight is applied to the washer to compress the packers. 20

I 4. In a washer including a pair of spaced packers, said washer having a plurality of superposed openings therein, said openings being positioned between the packers, a tube within the washer, said tube having holes therein opposite said 25 openings, means non-rotatably holding the tube within the washer, a valve on the lower end of the tube, a valve seat in the washer, a spear attached to the washer, said valve being adapted to rest on the seat when weight is applied to the 3 washer to compress the packers.

5. In a liner washer including a pair of spaced packers, said washer having a plurality of openings between the packers, a tube within the washer, said tube having holes therein opposite 5 said openings, a splined connection between the tube and the washer, a valve on the lower end of the tube, a seat in the washer below the Valve, said valve being adapted to engage the seat when the packers are expanded, thereby forcing fluid 40 thru the holes and openings, a spear on the washer, said spear holding the body against downward movement when set.

6. A telescoping liner washer, a pair of spaced packers, means coupling the packers, said washer .45 having openings therein between the spaced packers, a tube within the washer, said tube having holes therein opposite said openings, valve means in the washer operably connected to the tube, a spear attached to the washer, said valve means being closed and the packers expanded when thewasher is telescoped.

. Joint A. WILCOX. 

